1. Online Play
2. 2v2 Match
3. Create Match
4. Standard Uno Deck (Any option will probably work)
5. Change Score Limit to One Round. Other settings aren't too important.
6. Invite Friend
7. Once Friend is in lobby, hit
to Unlock Lobby and then
to Start Match.
8. Win against the AI 10 times.
People can join while the game is in progress and take over the bots, but you don't need to wait on 2 people, which is nice.
@ 8:55 the achievement pops: